Coherent detection of a 32-point 6PolSK-QPSK modulation format

We report a new 4-dimensional (4D) 6PolSK-QPSK modulation format which carries 32 constellation points and 5 bits per symbol. It can be used as an alternative to PM-QPSK and PM-8QAM in a flexible-rate coherent modem.

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